The correct answer to this open question is the following.
The way in which seniority practices within congressional committees minimize the impact of changes in voters' choices are the following. The practice is well accepted by members of Congress because it fits the way the select the chairman of a committee. Through the years, the seniority system has increased the power of the chairs of a committee. These are held any more by the leaders of the Republican or Democratic Party. This situation minimizes the impact of changes in voters' choices in that it gives advantages to legislators in safe districts, the districts that are heavily supported by voters who vote for one party on a traditional basis, not allowing the best person or the most qualified one to be the chairman.